Patents by Inventor Paul B. Covert

Paul B. Covert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Angle drafting set
    Patent number: 4974330
    Abstract: An improved angle drafting set is provided and consists of a trapezium tool and an angle modifier tool. The trapezium tool is so constructed that a person can accurately draw angles in five degree increments between zero degrees and three hundred and sixty degrees. The angle modifier tool is so constructed that when used in conjunction with the trapezium tool the person can accurately draw angles in whole degree increments between zero degrees and three hundred and sixty degrees with the trapezium tool.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: December 4, 1990
    Inventor: Paul B. Covert